This week's In the News focuses on calcium depletion in the forest soils of ten states in the Eastern US. Calcium depletion decreases the ability of trees to "ward off stresses such as temperature changes and insect defoliation". Scientists have noted that sugar maples and red spruce trees in ten different sites now have reduced resistance to "defoliation by insects and low winter temperatures". In a recent report, scientists Gregory Lawrence and Thomas Huntington of the US Geological Survey (US
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